230 



THE SKULL. 



[CHAP. 



rr 



MX 



FIG. 69. Under-surface of the cranium 

 of the Great Anteater (Myrmecophaga 

 jnbata), \. SO supraoccipital ; BO basi- 

 occipital ; ExO exoccipital ; Ty tym- 

 panic ; Pt pterygoid ; Sq. squamosal ; 

 AS alisphenoid ; OS orbitosphenoid ; 

 M malar ; L lacrymal ; PI palatine ; 

 MX maxilla ; PMx premaxilla. 



front, and not reaching the 

 very short zygomatic process 

 of the squamosal (Sq). The 

 lacrymals (L) are distinct, and 

 have a large perforation in 

 front of the margin of the 

 orbit. There are no postor- 

 bital processes to the frontals, 

 or any other demarcation 

 between the orbits and the 

 temporal fossae. 



The palate is extremely 

 elongated, and produced back- 

 wards as far as the level of 

 the external auditory meatus 

 by the meeting in the middle 

 line of the largely-developed 

 pterygoids (Pt). The glenoid 

 fossa is a shallow oval facet, 

 with its long diameter from 

 before backwards. 



The periotic, tympanic, and 

 squamosal are ankylosed to- 

 gether. A small mastoid 

 portion appears on the outer 

 side of the skull, forming a 

 roughened surface between the 

 squamosal and the exoccipital. 

 The tympanic (Ty) is some- 

 what triangular in form, 

 slightly bullate, and not pro- 

 longed into an auditory meatu?. 

 In front of the tympanic 



